I bought a 2016 ProMaster City last year and really like it. I went looking at its big brothers yesterday and I am considering getting a 1500 high roof. I will be ordering one because none of the ones the dealer had on the lot had the Navigation despite having the GPS antenna and touchscreen radio. They said it cannot be added even if it has the antennas. I wondered why do they even come with a GPS antenna if you cant add Navigation.